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 * COPYRIGHT LICENSE: This information contains sample code provided in source
 * code form. You may copy, modify, and distribute these sample programs in any 
 * form without payment to IBM for the purposes of developing, using, marketing 
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 * interface for the operating platform for which the sample code is written. 
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 * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS OR MODIFICATIONS TO THE SAMPLE
 * SOURCE CODE.
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 * All Rights Reserved. Licensed Materials - Property of IBM.  
 */
package com.example.source.spring.nonblocking;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.AsyncContext;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * @author Arun Gupta
 */
@WebServlet(urlPatterns = { "/ReadTestServlet" }, asyncSupported = true)
public class ReadTestServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     * 
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
                    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try {
            PrintWriter output = response.getWriter();
            output.println("<html>");
            output.println("<head>");
            output.println("<title>Reading asynchronously</title>");
            
            output.println("<meta charset=\"utf-8\"></meta>");
            output.println("<title>Servlet 3.1 WAS Classic tests</title>");
            output.println("<style>");
            output.println(".frm1{padding: 15px;background-color: #9666af; margin-bottom: 10px;}");
            output.println(".frm2{padding-left: 25px; font-family: Verdana; color: #440055;}");
            output.println(".big{font-size: 26px; color: white;}");
            output.println(".small{font-size: 12px;}");
            output.println("button, select{padding: 5px; padding-left: 20px; padding-right: 20px; margin:10px; width: 270px}");
            output.println("</style>");
            output.println("</head>");
            output.println("<body>");
            output.println("<body>");
            output.println("<div class=\"frm1\">");
            output.println("<div class=\"big\"> WAS Java EE 7 Sample - Non-blocking I/O using Servlet 3.1</div>");
            output.println("</div>");
            output.println("<div class=\"frm2\">"); 
            output.println("</div>");
            output.println("</head>");
            output.println("<body>");
            output.println("<h3>The following post data was read asynchronously using a Servlet 3.1 readListener</h3>");

            AsyncContext context = request.startAsync();
            ServletInputStream input = request.getInputStream();
            input.setReadListener(new MyReadListener(input, context, output));

        } catch (IOException ex) {
            Logger.getLogger(ReadTestServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     * 
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
                    throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     * 
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
                    throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * 
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
